Anomalous Reaction of Arylmalononitriles with Nitric Acid. Para-Directing Nature of Dicyanomethyl Group and a Through-Ring Nitro/aci-Nitro Tautomerism of 4-Nitrophenylmalononitrile
Mise en evidence d'equilibres de coordinaurs/heterolyse pour les reactors reversibles entre carbocations et carbionions。Cette possibilite est etudiee avec les trimethyl- et triphenyl-cyclopropene-2yl nitro-4' phenyl malononitriles
Basicities and Nucleophilicities of Pyrrolidines and Imidazolidinones Used as Organocatalysts
作者:Feng An、Biplab Maji、Elizabeth Min、Armin R. Ofial、Herbert Mayr
DOI:10.1021/jacs.9b11877
日期:2020.1.22
the attack of the amines at the electrophiles to be determined. The resulting second-order rate constants k2 followed the correlation log k2(20 °C) = sN(N + E), where electrophiles are characterized by one parameter (E) and nucleophiles are characterized by the two solvent-dependent parameters N and sN. In this way, the organocatalysts A1-A32 were integrated in our comprehensive nucleophilicity scale
The present invention relates to ion channel modulating agents. More particularly, the present invention relates to a particular class of chemical compounds that has proven useful as modulators of SK Ca, IK Ca and BK Ca channels. In further aspects, the present invention relates to the use of these SK/IK/BK channel modulating agents for the manufacture of medicaments, for methods of therapy, and pharmaceutical compositions comprising the SK/IK/BK channel modulating agents. The SK/IK/BK channel modulating agents of the invention are useful for the treatment or alleviation of diseases and conditions associated with the SK/IK/BK channels.
Single Enantiomer, Chiral Donor−Acceptor Metal Complexes from Bisoxazoline Pseudoracemates
作者:Jeffery M. Atkins、Shin A. Moteki、Stephen G. DiMagno、James M. Takacs
DOI:10.1021/ol060836s
日期:2006.6.1
Single enantiomer, chiral donor-acceptor metal complexes were synthesized via the self-discriminating zinc(II) complexation of a pseudoracemic mixture of donor/acceptor-substituted bisoxazoline derivatives.
A scalable approach to diaminopyrazoles using flow chemistry
作者:Noel S. Wilson、Augustine T. Osuma、Jennifer A.Van Camp、Xiangdong Xu
DOI:10.1016/j.tetlet.2012.05.152
日期:2012.8
This Letter reports on how the combination of microwave and continuous flow chemistry facilitated the convenient preparation of aminopyrazoles from commercial aryl halides. The method was applied to a variety of substrates with good to excellent yields and further extended toward the complete flow synthesis of 5,7-dimethyl-3-phenylpyrazolo[1,5-a]pyrimidin-2-amine. (c) 2012 Elsevier Ltd. All rights reserved.
Thermodynamics and kinetics of carbon-carbon bond formation and heterolysis through reactions of carbocations with carbanions in solution